Study Of Reservoir Evaluation And Forcasting Advantageous Regions Of Yanchang3to Yanchang4+5Sectors In Baibao Oil Field

By the depositional environment, diagenesis, structure and other factors, reserviors in baibao oil field have some characteristics like various types of Macroscopic properties and micro-pore, have large difference between reservior performance and flow stucture, and have complex flow layers.Basic geological feature had been fixed by the analysis of layer, stucture and reservoir. According to SP, GR, DEN, CNL, AC and RT logging datas and lithology, physicality and energy thickness statistics, analyzed the single permeability sand layer and it’s sedimentary energy thickness standard. Therefore, sedimentary energy and sand distribution, the direction of favorable microfaces and reservior can be clarified. Then using core, log and oil development performance data, established the effective thickness minimum standard, and evaluated oil layers, oil-water layers and other layers. By parameter selective preference, studied the flow unit comprehensive evaluation index system and analysis models. Using grey theory analyzed the micro pore geometry, flow&preserve characteristic, oil-gas possibility, and some other information, evaluated the reservior layers.Together with, the evaluation standards, got the relatively high permeability oil favorable areas, and it provide a favorable target for the oil field.